Prinicples of Pruning: Included Bark. Evergreen Shrubs. Prune evergreen shrubs, such as juniper and yew, in late March or early April before new growth begins. Light pruning may also be done in mid-summer. Avoid pruning evergreen shrubs in the fall. Fall pruned evergreens are more susceptible to winter injury. Deciduous Trees. Once established, rhododendron shrubs are low maintenance, requiring occasional pruning and fertilizing.
In spring and fall, top dress the base with compost and mulch. Treat with a slow release fertilizer a couple times a year. Buddleia alternifolia and Buddleia x pikei 'Hever' ('Hever Castle') should be pruned after they bloom, as they flower on new growth. According to The Southern Living Garden Book, when you prune butterfly bush, you should “remove some of the plant’s oldest wood down to within a few inches of ground.”.Estimated Reading Time: 5 mins.
Most non-blooming shrubs such as arborvitae (Thuja sp.) and cypress shrubs (Cupressus sp.) respond to late-fall, dormant pruning with a burst of new growth the following spring. Perennial Cleanup. Jul 03, Prune the blackberry lily in the fall to keep its foliage from collapsing. Limp foliage can cause the crown to rot and invite borers. 3 Cutting it back also can help stop unwanted self-seeding, preventing the plant from becoming invasive.
USDA growing zones: 5 to.